trails/infrastructure/grafana/dashboards/overview.json
Ullrich Schäfer a931cb03f8
Add service health monitoring: postgres, node, cAdvisor exporters + dashboard
Exporters:
- postgres_exporter: DB connections, transactions, cache hit ratio, query stats
- node_exporter: host CPU, memory, disk, network
- cAdvisor: per-container CPU and memory usage

PostgreSQL:
- Enable pg_stat_statements for query-level performance tracking
- Track index scans vs sequential scans, cache hit ratio

Dashboard (service-health.json):
- DB: connections, size, transactions/s, slow queries, cache hit ratio, index usage
- Host: disk gauge, CPU, memory, network I/O, disk I/O
- BRouter: request latency p50/p95/p99, container CPU + memory
- All containers: CPU and memory comparison

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-27 19:01:15 +01:00

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{
"title": "trails.cool Overview",
"uid": "trails-overview",
"timezone": "browser",
"refresh": "30s",
"panels": [
{
"title": "Request Rate",
"type": "timeseries",
"gridPos": {
"h": 8,
"w": 12,
"x": 0,
"y": 0
},
"targets": [
{
"expr": "sum(rate(http_request_duration_seconds_count[5m])) by (job)",
"legendFormat": "{{job}}"
}
]
},
{
"title": "Error Rate",
"type": "timeseries",
"gridPos": {
"h": 8,
"w": 12,
"x": 12,
"y": 0
},
"targets": [
{
"expr": "sum(rate(http_request_duration_seconds_count{status=~\"5..\"}[5m])) / sum(rate(http_request_duration_seconds_count[5m])) * 100",
"legendFormat": "Error %"
}
],
"fieldConfig": {
"defaults": {
"unit": "percent",
"thresholds": {
"steps": [
{
"color": "green",
"value": null
},
{
"color": "red",
"value": 5
}
]
}
}
}
},
{
"title": "Latency p50 / p95 / p99",
"type": "timeseries",
"gridPos": {
"h": 8,
"w": 12,
"x": 0,
"y": 8
},
"targets": [
{
"expr": "histogram_quantile(0.50, sum(rate(http_request_duration_seconds_bucket[5m])) by (le))",
"legendFormat": "p50"
},
{
"expr": "histogram_quantile(0.95, sum(rate(http_request_duration_seconds_bucket[5m])) by (le))",
"legendFormat": "p95"
},
{
"expr": "histogram_quantile(0.99, sum(rate(http_request_duration_seconds_bucket[5m])) by (le))",
"legendFormat": "p99"
}
],
"fieldConfig": {
"defaults": {
"unit": "s"
}
}
},
{
"title": "Health Status",
"type": "stat",
"gridPos": {
"h": 8,
"w": 12,
"x": 12,
"y": 8
},
"targets": [
{
"expr": "up",
"legendFormat": "{{job}}"
}
],
"fieldConfig": {
"defaults": {
"mappings": [
{
"type": "value",
"options": {
"0": {
"text": "DOWN",
"color": "red"
},
"1": {
"text": "UP",
"color": "green"
}
}
}
]
}
}
}
]
}